ptp clock

1. System interruption and clock cycle 1.1 system interruption Interrupt is a hardware mechanism that notifies the CPU Of an asynchronous event. Once the interrupt is identified by the system, the CPU stores partial (or all) context values, that is, the values of some (or all) registers, and jumps to a special subroutine, it is called the interrupt service subroutine (ISR ). Interrupt Service subprograms are used to process events. After processing i

A period of time ago the company organized a PPT training, a teacher at the beginning to play a clock screen, ask us how to achieve in the PPT. I didn't think about it for a long time. Three how the motion of the pointer is correlated. When the teacher announced the answer, it dawned on me. These two days have a user request PPT tutorial, I took this clock as an example to do this tutorial, technical conte

These days I was interested in the UI, so I made this little clock, the overall effect is very gorgeous, the parameters of the layer style I have given, only for everyone's reference, Shao Fei teacher said to "multiple test parameters, no one can one-step, spend more time to debug different parameters, can help improve design experience, the details by toss, Instead of relying on a lot of effect "I am doing this now, although sometimes it will take a

　　 AS3.0 Example Tutorial two-making of clocks Effect: Although the production clock is a bit cliché, it can be applied more fully to the knowledge of time, date and interval, which is still a good introductory practice. 　　I. Introduction to AS3.0 time and date Time and date are mainly applied in two aspects of the read time date and the setup interval. The time date in AS3.0 is still read with the date class, which is more convenient than the AS2

] desktop]# date +%d18This is the result of changing the letter from the letters above the wildcard characters to uppercase.[Email protected] desktop]# date +%y2016[Email protected] desktop]# date +%m13[Email protected] desktop]# date +%d11/18/16Date can also output text[[Email protected] desktop]# Date + "Today is%d"Today is 18[[Email protected] desktop]# Date + "This year is%Y"This is 20166, Clock,hwclockIt's been said in addition to date that you c

The most recent project page needs to display the server time in real time, and if the server time is loaded by Ajax every second, a lot of requests will be generated. A combination of "Javscript" and "Ajax Load Server Time" was designed to display server time. The Javscript clock runs automatically starting at an initial time, and "Ajax Load server Time" updates the server's time to the "Javscript clock"

1. Overview This article is mainly about how to customize a time clock, through simple exercises can be a simple study of Android in the custom view of some of the common drawing techniques to optimize the Android graphics operation. To start with, look at the effect we need to achieve: When we see this effect there should be some thinking in mind, we should break it down into the following steps:1. Instrument panel (Round)2, tick marks (long medi

During the event to enter the mobile phone Taobao Lantern Festival page, click to set the alarm clock can participate in robbery red envelopes activities Activity time: February 16-February 22 19 o'clock In the interface we just click "Set the alarm clock, grab the red envelopes", set the alarm clock that has the opportunity to get paid treasure cash red envelo

Copy Code code as follows: Package com.clock; Import Java.awt.BasicStroke;Import Java.awt.Color;Import Java.awt.Font;Import Java.awt.Graphics;Import Java.awt.Graphics2D;Import Java.awt.Insets;Import java.awt.event.ActionEvent;Import Java.awt.event.ActionListener;Import Java.awt.event.WindowAdapter;Import java.awt.event.WindowEvent;Import Java.util.Calendar;Import Java.util.GregorianCalendar; Import javax.swing.*; Import Javax.swing.JFrame; public class

1. We found the interface of "application" into the normal set alarm interface. 2. Click "Clock" and find it. 3. Again we find the "alarm clock" inside, we can click on the "+" icon, create a new alarm clock, as shown in the following figure. 4. Set the required alarm time, repeat date and other related parameters, and then click on the upper ri

How do you make a clock? The effect is shown in the following illustration: The clock is going to go on and on, but the page below is not going to be, and that's what we want to achieve. Below I will be divided into the following aspects: Date reference type in JavaScript Several examples of poor results The end result is good example If you want to look directly at the final exampl

tutorials | clock | video Tutorials 　　27th Quarter: clock screensaver (next) 　　Course Objectives: make a "clock" dynamic painted screen 　　Lesson points: use motion tween and flash ActionScript scripting technology to create a clock screensaver. This is the last section of this example tutorial. Watch Tutorials: [ Full

Android Phone small Alarm ClockIn daily life work, there are often important things or schedules, and the alarm clock, as a tool to remind people, becomes an indispensable part of many people's lives.The software includes the functions of alarm settings, alarm clock creation, alarm clock off and other modules. The use of this application is simple, easy to learn

This article is based on jquery to let the digital clock really run and implement a digital clock with a date and a week on the web page. The effect is very lifelike. If you are interested, let's take a look, let's show you what you are interested in. View demo source code download HTML Similar to the previous article: Using jQuery and CSS3 to create an HTML structure with the same digital

Well, we can look at the idea. Graphical interface in addition to the icons and music two resources are the code. Time is not used. The Timer component is the self-creating countdown of The Times class in a thread. Creating a record class for export records is nothing ....Program.cs The code is as follows: ? using System; Using System.Collections.Generic; Using System.Linq; Using System.Windows.Forms; namespace Tomato Bell { Static Class Program { The main entry point for the application. [STA

System clocks are often very useful, so be sure to memorizeDate is used to display and modify the current system datetime, mainly for time management, which is the system time software clockDate month day year. Seconds mmddhhmm[cc|yy].ss Date 121212122013.34 December 12, 2013 12 minutes 34 seconds years and seconds can be unspecified, default is current year and 00 secondsDate +%d Show Date Month Day year+%y/%y can display only the year small Y display two-bit year+%t Hour minute seconds+%f Mont

The pa.8 pin of the STM32 has a multiplexing function-clock output (MCO), which enables the STM32 internal clock to be output through pa.8. Operation Flow: 1), set pa.8 to multiplex push-pull mode. Gpio_initstructure.gpio_pin = Gpio_pin_8; Gpio_initstructure.gpio_speed = Gpio_speed_50mhz; Gpio_initstructure.gpio_mode = gpio_mode_af_pp; Gpio_init (Gpioa, gpio_initstructure); 2), select the output

The PLL is an abbreviation for the phase-locked Loop, and the Chinese meaning is a phase-locked loop. The PLL is essentially a closed-loop feedback control system that allows the PLL output to maintain a fixed phase relationship with a reference signal. The PLL is typically composed of a phase detector, a charge amplifier (Charge Pump), a low-pass filter, a voltage-controlled oscillator (electrical), and some form of output converter. To make the PLL's output frequency a multiple of the referenc

From the perspective of clock source, there are two types of external clock (E) and internal clock (I ).From the perspective of clock rate, there are two types of high-speed clock (HS) and low-speed clock (LS ).In combination, the

#define XTAL_FREQ 12000000#define Vect_tab_offset 0x0000void Systeminit(void){PLL0 Clock ConfigurationLPC_SC-SCS = 0X00000020; /* Enable external primary oscillator, frequency range 1-20m*/if (lpc_sc, SCS (1 5) /*/main clock enabled */{ while (lpc_sc,SCS (16)) = = 0); /* Wait for the main crystal to enable and stabilize */}LPC_SC-cclkcfg = 0x00000003; /* Select the PLL to CCLK divide 4 */LPC_SC-PCLKSEL0